Transmission Outputs
TRANSMISSION SOLENOID POWER CONTROL (TSPC - PROVIDES POWER TO ALL TRANSMISSION SOLENOIDS
| DTCs | P0657 - TSPC1 fault, impacts SSA, SSC, SSE P2669 - TSPC2 fault, impacts SSB, SSD, TCC and LPC |
| Monitoring Execution | Electrical - Continuous |
| Monitor Sequence | Disables individual solenoid circuit fault detection if either above DTC sets and power is removed from all solenoids (one relay, removes power from both TSPC1 and TSPC2 wires) |
SHIFT SOLENOID CHECK OPERATION
| DTCs | SS A - Electrical: P0750 (Open), P0973 (short to ground), P0974 (short to power) Functional: P0751 (stuck off), P0752 (stuck on) SS B - Electrical: P0755 (Open), P0976 (short to ground), P0977 (short to power) Functional: P0756 (stuck off), P0757 (stuck on) SS C - Electrical: P0760 (Open), P0979 (short to ground), P0980 (short to power) Functional: P0761 (stuck off), P0762 (stuck on) SS D - Electrical: P0765 (Open), P0982 (short to ground), P0983 (short to power) Functional: P0766 (stuck off), P0767 (stuck on) SS E - Electrical: P0770 (Open), P0985 (short to ground), P0986 (short to power) Functional: P0771 (stuck off), P0772 (stuck on) |
| Monitor Execution | Electrical - Continuous, Functional - Continuous |
| Monitor Sequence | None |
| Sensors OK | TRS, TSS and OSS ok for functional diagnostics |
| Monitoring Duration | 0.5 to 5 seconds for electrical checks, 3 clutch failed to apply (stuck off) or release (stuck on) events for functional check |
TYPICAL SHIFT SOLENOID MECHANICAL FUNCTIONAL CHECK ENTRY CONDITIONS
| Entry Conditions (with turbine speed) | Minimum | Maximum |
| Gear Ratio Calculated | Each Gear | |
| Throttle Position | Positive Drive Torque |
TYPICAL SHIFT SOLENOID MECHANICAL FUNCTIONAL CHECK ENTRY CONDITIONS
| Entry Conditions (without turbine speed) | Minimum | Maximum |
| Rpm drop is obtained | each shift | |
| Throttle position | positive drive torque |
TYPICAL SHIFT SOLENOID MALFUNCTION THRESHOLDS
| Electrical circuit check: Output driver feedback indicates an open, short to ground or open circuit for 0.5 - 5.0 seconds |
GEAR RATIO CHECK OPERATION
| DTCs | P0731 - incorrect gear 1 ratio P0732 - incorrect gear 2 ratio P0733 - incorrect gear 3 ratio P0734 - incorrect gear 4 ratio P0735 - incorrect gear 5 ratio P0729 - incorrect gear 6 ratio P0736 - incorrect reverse ratio 6 |
| Monitor Execution | Continuous, in each gear |
| Monitor Sequence | None |
| Sensors OK | TSS, OSS, wheel speed |
| Monitoring Duration | 12 seconds |
TYPICAL FORWARD GEAR RATIO CHECK ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Gear selector position | forward range, > 8 seconds |
|
| Engine Torque | 100 NM | |
| Throttle position | 10% | |
| Not shifting | >0.5 seconds | |
| Engine/input Speed | 550 rpm | |
| Output Shaft Speed | 250 rpm | 1350 rpm |
TYPICAL NEUTRAL GEAR RATIO CHECK ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Gear selector position | forward range, > 1 second |
|
| Absolute value of Engine rpm - Turbine rpm | 150 rpm | |
| Output Shaft Speed | 500 rpm |
TYPICAL GEAR RATIO MALFUNCTION THRESHOLDS
| Forward gear check: > 20% error in commanded ratio for > 12 seconds |
TYPICAL SHIFT COMPLETION CHECK ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Gear selector position | forward range | |
| Transmission Fluid Temp | 50 °F | |
| Engine/input Speed | 1200 rpm | |
| Output Shaft Speed | 256 rpm |
TYPICAL SHIFT COMPLETION MALFUNCTION THRESHOLDS
| Up-shift rpm check: rpm does not drop by > 30 rpm Down-shift rpm check: rpm does not increase by > 30 rpm Up-shift rpm check: rpm increases (flares) by > 300 rpm |
TORQUE CONVERTER CLUTCH CHECK OPERATION
| DTCs | Electrical: P0740 (open), P0742 (short to ground), P0744 (short to power) Functional: P0741 (stuck off), P2758 (stuck on)
NOTE:
P2758 is non-MIL, all other TCC DTC's are MIL
|
| Monitor Execution | electrical - continuous, mechanical - TCC fails to apply 3 times (stuck off) or fails to release 3 times (stuck on) |
| Monitor Sequence | None |
| Sensors OK | TSS, OSS |
| Monitoring Duration | Electrical - 5 seconds, Functional - 3 lock-up or release events |
TYPICAL TCC MECHANICAL FUNCTIONAL CHECK STUCK OFF ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Throttle Position | steady | |
| Engine Torque | positive drive torque | |
| Transmission Fluid Temp | 70 °F | 225 °F |
| Commanded TCC pressure (0 rpm slip) | 55 psi | none |
| Not shifting |
TYPICAL TCC MALFUNCTION THRESHOLDS
| Electrical circuit check: Output driver feedback circuit does not match commanded driver state for 0.5 - 5.0 seconds Mechanical check, stuck off: Slip across torque converter > 100 for 3 seconds after each of 3 lock events Mechanical check, stuck on: Slip across torque converter < 20 rpm with converter commanded off in at least 3 different gears |
PRESSURE CONTROL SOLENOID CHECK OPERATION
| DTCs | P0960, P0962, P0963 - PC A opens/shorts P0961 - PC A current range |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK | |
| Monitoring Duration | Electrical: 5 seconds, |
TYPICAL PRESSURE CONTROL SOLENOID MECHANICAL FUNCTIONAL CHECK ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Gear ratio calculated | each gear | |
| Transmission Fluid Temperature | 70 °F | 225 °F |
| Throttle Position | positive drive torque |
TYPICAL PRESSURE CONTROL SOLENOID MALFUNCTION THRESHOLDS
| Electrical circuit check: Output driver feedback circuit does not match commanded driver state for 0.5 - 5.0 seconds Electrical current check: Feedback current out of range for 0.5 seconds |